MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Powder Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is not a type of bearing? |
| A. | Steel backed steel |
| B. | Teflon bearing |
| C. | Babbit backed steel |
| D. | Unbacked bearings |
| Answer» D. Unbacked bearings | |
| 2. |
The performance factor is given by ______ |
| A. | PV |
| B. | VF |
| C. | AV |
| D. | FA |
| Answer» B. VF | |
| 3. |
Under which of the following mechanisms the bearing performance depends on the ability of the lubricant to maintain a boundary film under load? |
| A. | Hydrostatic lubrication |
| B. | Boundary film lubrication |
| C. | Hydrodynamic lubrication |
| D. | Aerodynamic lubrication |
| Answer» C. Hydrodynamic lubrication | |
| 4. |
_________ is possible only with the help of a pump during starting. |
| A. | Hydrostatic lubrication |
| B. | Boundary film lubrication |
| C. | Hydrodynamic lubrication |
| D. | Aerodynamic lubrication |
| Answer» D. Aerodynamic lubrication | |
| 5. |
_______ is obtained by subtracting the density (%) of the material from 100. |
| A. | Hardness |
| B. | Porosity |
| C. | Specific gravity |
| D. | Ductility |
| Answer» C. Specific gravity | |
| 6. |
Which type of porosity is connected to one another and to the external surface? |
| A. | Moderate |
| B. | Open |
| C. | Closed |
| D. | Interconnected |
| Answer» E. | |
| 7. |
________ type of porosity serves no purpose and must be minimized. |
| A. | Moderate |
| B. | Open |
| C. | Closed |
| D. | Interconnected |
| Answer» D. Interconnected | |
| 8. |
Which of the following is not a characteristic of a P/M bearing material? |
| A. | Ability to withstand both static and impact loads |
| B. | Good wear characteristics |
| C. | Good heat dissipation capacity |
| D. | Short service life |
| Answer» E. | |
| 9. |
The load carrying capacity of bearing is expressed as the _______ |
| A. | efficiency factor |
| B. | work factor |
| C. | performance factor |
| D. | capability factor |
| Answer» D. capability factor | |
| 10. |
What is the PV value for thrust bearings? |
| A. | 10,000 |
| B. | 50,000 |
| C. | 20,000 |
| D. | 30,000 |
| Answer» B. 50,000 | |